Demolding device and demoulding method for closed-angle C-shaped parts

Abstract

The present invention discloses a demoulding device and demoulding method for closed-angle C-shaped parts. The demoulding device includes a mold body, an end core mold, a pin, a mold-opening screw, and a slot block. The mold body and the end core mold are made of the same material and are connected by a pin. The end core mold is trapezoidal, and its cross-section is consistent with the working part of the mold body, and the mating surfaces of the two are perpendicular to the bottom surface of the mold body. The mold-opening screw can realize the separation of the end core mold from the mold body; the slot block can realize the separation of the part from the mold body. The present invention can solve the problems of difficulty in demoulding closed-angle C-shaped parts and easy damage to parts during the demoulding process. The device has a simple structure and is easy to use. It can quickly complete the demoulding of closed-angle C-shaped parts without damaging the surface of the part and the R angle area.

Description

Technical Field

[0001] The invention relates to the field of composite material parts manufacturing, in particular to a demoulding device and a demoulding method for closed-angle C-shaped parts. Background Art

[0002] C-type parts are a relatively typical structural form of composite parts, and are widely used in structural types such as beams, ribs, and angle pieces. Due to the complexity of aircraft structures, in specific areas, the angle between the side edges and the web in the cross section of C-type parts is less than 90°. And due to the unique curing shrinkage effect of composite materials, after curing, the parts are tightly wrapped on the working surface of the mold and cannot be demolded. In the demolding process of traditional C-type parts, tools such as screwdrivers are usually used to separate the parts from the mold, which can easily cause problems such as R-angle delamination and product surface scratches, affecting product quality. Therefore, there is an urgent need for a demolding device and demolding method for closed-angle C-type parts to solve the problem that such parts are difficult to demold and the parts are easily damaged during the demolding process. Summary of the Invention

[0003] The purpose of the present invention is to provide a demoulding device and a demoulding method for closed-angle C-shaped parts, so as to solve the problems that closed-angle C-shaped parts are difficult to demould and parts are easily damaged during the demoulding process.

[0004] The object of the present invention is achieved through the following technical solutions:

[0005] A demolding device for closed-angle C-shaped parts comprises a mold body, an end core mold, a pin, a mold-opening screw, and a slot block. The end core mold's cross-section is made of the same material as the mold body, and their working parts are identical. The end core mold and the mold body are provided with coaxial pin connection holes, connected by the pin. Their mating surfaces are perpendicular to the bottom surface of the mold body. The slot block is made of self-lubricating polytetrafluoroethylene. The side that contacts the part is the working surface, and the other side is the non-working surface. The working surface has a wedge-shaped cross-section.

[0006] Furthermore, the height of the end core mold is 100mm to 200mm from the web surface of the part downward to the outside of the part outline; the length of the end core mold is 1 / 5 to 1 / 3 of the total length of the part.

[0007] Furthermore, a mold-opening screw and a threaded removal hole are axially arranged on the end core mold. The length of the screw thread is greater than the length of the end core mold. The mold-opening screw cooperates with the threaded removal hole, and the length entering the core mold can be adjusted through the thread until the mold-opening screw contacts the mold body, and the end core mold is ejected by utilizing the reaction force generated by the mold body.

[0008] Furthermore, the length of the slot block is 50 mm to 100 mm; and a handle is provided on the outside of the slot block.

[0009] Furthermore, the cross-section of the working surface of the slot block is wedge-shaped, and the height is 2 / 3 to 3 / 4 of the total height of the closed-angle C-shaped part; the maximum distance between the working surface and the non-working surface is 10 times the thickness of the edge strip surface of the closed-angle C-shaped part.

[0010] The method for demoulding a closed-angle C-shaped part using the above device comprises the following steps:

[0011] 1 After the cured parts have completely cooled, remove the connecting pins;

[0012] 2. Screw the mold opening screw into the threaded removal hole and push the end core mold out through the reaction force;

[0013] 3. Place the groove block between the part and the mold body from the original end core mold position, and move the groove block along the length of the mold to separate the edge surfaces on both sides of the closed angle C-shaped part from the mold;

[0014] 4 Remove the part from the mold body along the length of the mold to complete the demoulding.

[0015] The beneficial effects of the present invention are:

[0016] 1. The demoulding device of the present invention has a simple structure and is easy to install and dismantle. The device has high long-term stability and can realize the smooth demoulding of closed-angle C-shaped parts. The groove block therein can also be used for the demoulding of other composite material parts with flanges.

[0017] 2. The demoulding method of the present invention can effectively remove the wrapping force generated by the shrinkage of the composite parts during the curing process and the adhesion force of the excess resin on the mold during the curing process, without causing additional damage to the surface of the part and the R corner area. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Overall schematic diagram of the demoulding device;

[0019] Figure 2 Schematic diagram of the separation of the end core mold and the mold body;

[0020] Figure 3 Schematic diagram of the use of slot blocks;

[0021] Explanation of the numbers in the figure: 1-mold body; 2-end core mold; 3-pin; 4-screw; 5-slot block; 6-parts. DETAILED DESCRIPTION

[0022] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0023] The purpose of the present invention is to provide a demoulding device for closed-angle C-shaped parts to solve the problems existing in the prior art and prevent closed-angle C-shaped parts from having problems such as delamination and surface scratches during the demoulding process.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] The present invention provides a demoulding device for closed-angle C-shaped parts, such as Figures 1 to 3 As shown, it includes a mold body 1, an end core mold 2, a pin 3, a mold opening screw 4, and a slot block 5. The cross-section of the end core mold 2 is made of the same material as the mold body 1, and the working parts of the two are the same. The end core mold 2 and the mold body 1 have connecting holes for the pin 3. The connecting holes are coaxial, and the two are connected by the pin 3. The mating surface of the two is perpendicular to the bottom surface of the mold body 1. The slot block 5 is made of polytetrafluoroethylene with self-lubricating properties. The side that contacts the part 6 is the working surface, and the other side is the non-working surface. The cross-section of the working surface is wedge-shaped.

[0026] Taking the demoulding of a closed-angle C-beam as an example, unlike the traditional technical solution in which the mold of the C-beam is a whole, the basic technical idea adopted by the present invention is to divide the forming mold of the C-beam in the existing technical solution into two parts: the mold body 1 and the end core mold 2, and to add auxiliary demoulding devices: the mold opening screw 4 and the slot block 5. The end core mold 2 can be separated from the mold body 1 by the reaction force of the mold opening screw 4, and then the slot block 5 is inserted from the original position of the end core mold 2, and the slot block 5 is moved along the length direction of the part 6 to separate the edge strips on both sides of the part 6 from the mold body 1. Due to the special material and shape of the slot block 5, it can effectively remove the adhesion of excess resin to the mold during the curing process of the composite part during the movement process, thereby facilitating the smooth demoulding of the part and reducing the risk of part delamination and scratches caused by violent demoulding in the original solution.

[0027] The height of the end core mold 2 is 100mm to 200mm from the web surface of the part 6 to the outside of the part outline, preferably 100mm; the length of the end core mold 2 is 1 / 5 to 1 / 3 of the total length of the part 6, preferably 1 / 5.

[0028] The end core mold 2 is axially provided with a mold opening screw 4 and a threaded removal hole. The thread length of the mold opening screw 4 is greater than the length of the end core mold 2, and the preferred length is 1.5 times the length of the end core mold 2. The mold opening screw 4 cooperates with the threaded removal hole, and the length of entering the end core mold 2 can be adjusted through the thread, so that it generates a force on the mold body 1, and the reaction force of the mold body 1 is used to push out the end core mold 2.

[0029] Preferably, the aperture of the threaded removal hole should be parallel to the bottom surface of the end core mold 2, which is more conducive to the movement of the end core mold 2.

[0030] The length of the slot block 5 is 50 mm to 100 mm, preferably 50 mm; the slot block 5 is provided with a handle on the outside for easy movement.

[0031] The working cross-section of the groove block 5 is wedge-shaped. During demoulding, one side contacts the mold body 1 and the other side fits the part 6. The height of the working surface is 2 / 3 to 3 / 4 of the total height of the closed-angle C-shaped part 6, preferably 3 / 4; the side with the handle is the non-working surface, and the maximum distance between the working surface and the non-working surface is 10 times the thickness of the edge surface of the closed-angle C-shaped part 6.

[0032] The present invention also provides a demoulding method for closed-angle C-shaped parts, such as Figures 1 to 3 As shown, the following steps are included:

[0033] S1, after the solidified part 6 is completely cooled, the connecting pin 3 is removed;

[0034] S2, screw the mold opening screw 4 into the threaded removal hole until the mold opening screw 4 contacts the mold body 1, and continue to tighten the mold opening screw 4 to eject the end core mold 2 through the reaction force;

[0035] S3, place the groove block 5 between the part 6 and the mold body 1 from the original end core mold 2 position, hold the handle tightly, and move the groove block 5 along the length direction of the mold to separate the two side edges of the closed angle C-shaped part 6 from the mold body 1 respectively;

[0036] S4, the part 6 is pulled out along the length direction of the main mold 1, and the demoulding is completed.

[0037] The purpose of the present invention is to provide a demoulding device and a demoulding method for closed-angle C-shaped parts, so as to solve the problems that closed-angle C-shaped parts are difficult to demould and parts are easily damaged during the demoulding process.

[0038] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as covering the preferred embodiments and all changes and modifications that fall within the scope of the invention. The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. It should be noted that any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A demolding device for closed-angle C-shaped parts, comprising a mold body, an end core mold, a pin, a mold-opening screw, and a slot block. The cross-section of the end core mold is made of the same material as the mold body, and the working parts of the two are the same. The end core mold and the mold body are provided with pin connection holes, and the connection holes of the two are coaxial. The two are connected by the pin, and the mating surfaces of the two are perpendicular to the bottom surface of the mold body. The slot block is made of polytetrafluoroethylene with self-lubricating properties. The side in contact with the part is the working surface, and the other side is the non-working surface. The cross-section of the working surface is wedge-shaped.

2. A demoulding device for closed-angle C-shaped parts according to claim 1, characterized in that The height of the end core mold is 100mm to 200mm from the web surface of the part downward to the outside of the part outline; the length of the end core mold is 1 / 5 to 1 / 3 of the total length of the part.

3. The demoulding device for closed-angle C-shaped parts according to claim 1, characterized in that The end core mold is axially provided with a mold opening screw and a threaded removal hole. The length of the screw thread is greater than the length of the end core mold. The mold opening screw cooperates with the threaded removal hole. The length of the mold entering the core mold can be adjusted through the thread, so that it generates a force on the mold body.

4. The demoulding device for closed-angle C-shaped parts according to claim 1, characterized in that The length of the slot block is 50mm to 100mm; the slot block has a handle on the outside.

5. The demoulding device for closed-angle C-shaped parts according to claim 1, characterized in that The cross-section of the working surface of the slot block is wedge-shaped, and the height is 2 / 3 to 3 / 4 of the total height of the closed-angle C-type part; the maximum distance between the working surface and the non-working surface is 10 times the thickness of the edge strip surface of the closed-angle C-type part.

6. A demoulding method for closed-angle C-shaped parts, characterized in that A method for demoulding using the demoulding device according to any one of claims 1 to 5, comprising the following steps: 6-1 After the cured parts have completely cooled, remove the connecting pins; 6-2 Screw the mold opening screw into the threaded removal hole and push the end core mold out through the reaction force; 6-3 Place the slot block between the part and the mold body from the original end core mold position, and move the slot block along the length of the mold to disengage the two side edges of the closed angle C-shaped part from the mold; 6-4 Remove the part from the mold body along the length direction of the mold to complete the demoulding.

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